/**
* Validates a single attribute.
*
* @param CModel $object the data object being validated
* @param string $attribute the name of the attribute to be validated.
*/
protected function validateAttribute($object, $attribute)
{
if (!$object->isAttributeDirty($attribute)) {
return;
}
if ($this->model === null) {
//currently unsupported
return;
}
if ($this->message === null) {
$this->message = '{attribute} can not be edited because it is already in use';
}
if ($this->foreignKey === null) {
$this->foreignKey = $object->tableName() . '_id';
}
if ($this->validateContainedInModel($object->id)) {
$this->addError($object, $attribute, $this->message);
}
}